Multifunctional torque standard device

Abstract

The utility model discloses a multifunctional torque standard device, which belongs to the technical field of instrument metering detection and comprises a horizontal rack, a speed reducer is fixedly arranged on one side of the rack, and the input end of the speed reducer is connected with a servo motor; two parallel tracks are fixedly arranged on the rack; three supporting seats are arranged on the track, a first supporting seat is fixedly arranged next to the speed reducer, and an output shaft of the speed reducer penetrates through the first supporting seat and is connected with a first standard torque sensor through a first coupler; a second supporting seat and a third supporting seat are arranged on a rail on one side, far away from the speed reducer, of the first supporting seat; a second standard torque sensor is arranged between the second supporting seat and the third supporting seat; and two counter-force baffles are arranged on the second supporting seat. According to the utility model, various torque instruments such as hydraulic wrenches, torque multipliers, torque meters and the like can be detected and calibrated; and the movable second supporting seat on the horizontal rack can horizontally adjust the detection space, so that the operation is easier and more convenient, and the replacement of parts is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of instrument measurement and detection, and particularly relates to a multifunctional torque standard device. Background Art

[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] With the development of science and technology, torque multipliers and hydraulic wrenches, torque meters, electric tightening tools, pneumatic tightening tools, torque wrenches and other torque instruments are more and more widely used. They are mainly used in large bolt and nut connections. The tightening torque needs to reach several thousand to tens of thousands of Newton meters, or even hundreds of thousands of Newton meters. During work, these torque instruments need to be frequently measured, tested and calibrated.

[0004] Patent CN203069321U discloses a standard calibration device for torque wrenches, which adopts a vertical structure. The torque sensor is driven to rotate by the reducer output shaft connecting circle and the transmission screw. The torque sensor in turn drives the torque wrench connector to rotate to detect the torque value of the wrench.

[0005] Although this device can realize torque detection and calibration functions, its function is single and it can only detect and calibrate torque wrenches. In addition, it adopts a vertical structure, which makes it difficult to adjust the detection space, has weak torsional strength, and is not conducive to the installation, replacement and disassembly of large-scale torque sensors on the device. Utility Model Content

[0006] In response to the above problems, the utility model provides a multifunctional torque standard device, which adopts a horizontal structure, is equipped with a reducer and multiple support seats, so that the output end of the reducer is coaxially connected with the first standard torque sensor and the second standard torque sensor, and is provided with a reaction force baffle, so that it can detect and calibrate various torque instruments such as hydraulic wrenches, torque multipliers, torque meters, electric tightening tools, pneumatic tightening tools, torque wrenches, etc.; and the horizontal adjustment of the detection space makes operation easier and more convenient, and is also more conducive to the replacement of components.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A multifunctional torque standard device includes a horizontal platform, a reducer is fixedly arranged on one side of the platform, and the input end of the reducer is connected to the servo motor; on the side of the reducer away from the servo motor, two parallel tracks are fixedly arranged on the platform, and the tracks are parallel to the output shaft of the reducer;

[0009] Three support seats are provided on the track, a first support seat is fixedly provided next to the reducer, and the output shaft of the reducer passes through the first support seat and is connected to the first standard torque sensor through the first coupling;

[0010] A second support seat and a third support seat are slidingly arranged on the track on one side of the first support seat away from the reducer, and a second standard torque sensor is arranged between the second support seat and the third support seat; two reaction baffles are arranged on the second support seat.

[0011] Preferably, a first bearing is fixedly arranged on the first support seat, and the center of the first bearing is coaxially arranged with the output shaft of the reducer, and the output end of the reducer passes through the first bearing to connect with the first coupling.

[0012] Preferably, a second bearing is fixedly provided on the second support seat, and the center of the second bearing is coaxial with the output shaft of the reducer.

[0013] Preferably, the reaction baffle is located below the second bearing, and the two reaction baffles are symmetrically distributed relative to the second bearing.

[0014] Preferably, a second coupling is fixedly provided on the third support seat, the second coupling is coaxial with the output shaft of the reducer, and the second coupling is connected to a second standard torque sensor.

[0015] Preferably, the first standard torque sensor has a small range, and the second standard torque sensor has a large range.

[0016] Preferably, the bottom of each support seat is fixedly connected to two sliders, the two sliders are matched with the rails, and the distance between the sliders is equal to the distance between the rails.

[0017] Preferably, the cross section of the track is in the shape of an I, a groove is provided on the slider, and protrusions are provided on both sides of the groove, so that the slider can be engaged with the track.

[0018] Preferably, a bolt hole is provided on the top of the slider, and a bolt is screwed into the bolt hole of the slider so that the bolt presses against the rail.

[0019] Compared with the prior art, the advantages and positive effects of this utility model are:

[0020] The utility model adopts a horizontal structure, is provided with a reducer and multiple support seats, so that the output end of the reducer is coaxially connected with the first standard torque sensor and the second standard torque sensor, and is provided with a reaction force baffle, so that it can detect and calibrate various torque instruments such as hydraulic wrenches, torque multipliers, torque meters, electric tightening tools, pneumatic tightening tools, torque spanners, etc.; and through the movement of the second support seat, the detection space can be adjusted horizontally, which makes the operation easier and more convenient, and is also more conducive to the replacement of components. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0022] Figure 1 is a three-dimensional schematic diagram of a torque standard device according to an embodiment of the present utility model;

[0023] Figure 2 This is a front view of a torque standard device according to an embodiment of the present invention;

[0024] Figure 3 This is a three-dimensional schematic diagram of the torque standard device of the embodiment of the utility model when testing a hydraulic wrench;

[0025] In the picture:

[0026] 1. Test bench; 2. Reducer; 3. Servo motor; 4. Track; 41. Slider; 5. First support seat; 6. Second support seat; 61. Reaction baffle; 7. Third support seat; 8. First coupling; 9. First standard torque sensor; 10. Second coupling; 11. Second standard torque sensor; 12. First bearing; 13. Second bearing; 14. Hydraulic wrench; 15. Torque multiplier. DETAILED DESCRIPTION

[0027] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0028] The present invention will be described in detail below with reference to the accompanying drawings. This embodiment discloses a multifunctional torque standard device, such as Figure 1 As shown, it includes a horizontal platform 1, a reducer 2 is fixedly arranged on one side of the platform 1, and an input end of the reducer 2 is connected to a servo motor 3.

[0029] like Figure 1 、 Figure 2 、 Figure 3 As shown, on the side of the reducer 2 away from the servo motor 3, two parallel tracks 4 are fixedly installed on the platform 1. The tracks 4 are parallel to the output shaft of the reducer 2. There are multiple support seats on the tracks 4. The bottom of each support seat is fixedly connected to two sliders. The two sliders are used in conjunction with the tracks. The distance between the sliders is equal to the distance between the tracks. Figure 1 As shown, the cross-section of the track 4 is in the shape of an "I", and a groove is provided on the slider 41, and protrusions are provided on both sides of the groove, which can engage the slider 41 on the track 4, thereby ensuring that the support seat can move horizontally along the track without offset.

[0030] It is understandable that a bolt hole can also be opened on the top of the slider 41. When the support seat moves to the desired position, a bolt is screwed into the bolt hole of the slider 41 so that the bolt presses against the track 4, thereby fixing the support seat in the current position.

[0031] In this embodiment, three support bases are provided. The first support base 5 is located adjacent to the reducer 2 and is fixed to the track 4 according to the length of the output shaft of the reducer 2. A first bearing 12 is provided on the first support base 5, and the center of the first bearing 12 is coaxial with the output shaft of the reducer 2. The output shaft of the reducer 2 passes through the first bearing 12, and the end of the output shaft of the reducer 2 is connected to the first standard torque sensor 9 via the first coupling 8, so that the first standard torque sensor 9 rotates coaxially with the output shaft of the reducer 2.

[0032] like Figure 1 As shown, the stand 1 is also provided with a second support seat 6, and a second bearing 13 is provided on the second support seat 6. The center of the second bearing 13 is coaxial with the output shaft of the reducer 2. Two reaction baffles 61 are also provided on the second support seat 6. The reaction baffles 61 are located below the second bearing 13, and the two reaction baffles 61 are symmetrically distributed relative to the second bearing 13.

[0033] like Figure 1 As shown, a third support base 7 is provided to the right of the second support base 6. A second coupling 10 is fixedly mounted on the third support base 7. The second coupling 10 is coaxial with the output shaft of the reducer 2. The second coupling 10 is connected to one end of a second standard torque sensor 11, the other end of which passes through a second bearing 13. The difference between the first and second standard torque sensors is that the second standard torque sensor has a larger range, while the first standard torque sensor has a smaller range. In this embodiment, the range of the first standard torque sensor is 5 kNm, and the range of the second standard torque sensor is 20 kNm. It is understood that the ranges of the first and second standard torque sensors can be changed to different specifications based on actual needs. For example, the second standard torque sensor can use a torque sensor with a larger range, while the first standard torque sensor can use a torque sensor with a smaller range. The overall fuselage frame and related components are designed to ensure an effective safety factor, and the couplings are all based on existing technology.

[0034] In this embodiment, the first bearing and the second bearing are used to withstand the bending moment generated by the device being tested during the testing process. Ball bearings can be used, and their size is selected according to actual conditions, because the friction between the inner and outer rings of the ball bearings will not have a substantial impact on the measurement results, and they are economical and more common. In other embodiments, air bearings can be used.

[0035] In this embodiment, the two couplings, two standard torque sensors and the output shaft of the reducer are kept coaxial in order to ensure coaxiality and offset the measurement error caused by structural deformation.

[0036] Testing should be conducted in accordance with the requirements of JJF1610-2017, JJG707-2014, and JJG797-2013. The test should be conducted at a room temperature of (20±5)°C and a relative humidity of no more than 80%. During the test, the room temperature should not fluctuate by more than 2°C. During the test, there should be no vibration, impact, electromagnetic fields, or other interference sources that may affect the test results.

[0037] Before testing, the equipment to be tested must be placed under the calibration conditions for a sufficient period of time to ensure that its temperature is the same as and stable under the calibration conditions. The recommended placement time is as required by the product manual or no less than 8 hours.

[0038] During calibration, control the servo motor to load or unload the device under test and the standard torque sensor slowly and smoothly, avoiding impact or overloading. Load the device under test at least three times, maintaining the load for 30 seconds to 1 minute. Record and compare the readings of the device under test and the standard torque sensor. After each preload is completely removed, wait at least 30 seconds for the indicator to return to zero. Check the indicator's return to zero and readjust the zero point as needed.

[0039] Working principle:

[0040] like Figure 3 As shown, when the hydraulic wrench 14 is being tested, the second support seat 6 and the third support seat 7 are installed, and one end of the second standard torque sensor 11 is installed on the second coupling so that the second standard torque sensor 11 is located between the second and third support seats, and the hydraulic wrench 14 is connected to the other end of the second standard torque sensor 11; since the hydraulic wrench has its own hydraulic pump station, it can provide pressure. When the wrench head is pushed to rotate, its reaction arm can press the reaction baffle 61 to offset the reaction force, so that the second standard torque sensor 11 can collect data from the hydraulic wrench 14. The operation is repeated several times to complete the test and perform calibration.

[0041] like Figure 1 As shown, when testing the torque multiplier 15, the output of the torque multiplier 15 is first connected to the second standard torque sensor 11, and then the input is connected to the first standard torque sensor 9. The servo motor then rotates, and the output of the reducer generates input torque at the input of the torque multiplier 15. The reaction arm of the torque multiplier 15 presses against the reaction baffle 61, while the output continues to rotate to generate output torque. The first standard torque sensor collects the input torque, while the second standard torque sensor collects the output torque. The output torque value is divided by the input torque value to obtain the multiplier's amplification factor K for calibration.

[0042] When the torque meter is being tested, the second support seat 6 is removed, and the second standard torque sensor is removed, and the torque meter is connected to the first standard torque sensor and the second coupling; then the servo motor rotates, and the output end of the reducer generates input torque at the torque meter being tested; the values of the first standard torque sensor and the torque meter being tested are compared to calibrate the torque meter being tested.

[0043] When testing an electric pneumatic torque wrench with a range greater than 2000Nm, because it is expensive and easily damaged, you can first connect a simulated bolt and then connect a second standard torque sensor with a torque sensor of 20000Nm or greater.

[0044] It can be understood that the first support seat is fixed on the track and has a fixed position, while the second support seat and the third support seat are movable relative to the first support seat, so that they can be adjusted according to the type and size of the object to be detected, thereby enabling this standard device to realize torque calibration for detection objects of different types and sizes.

[0045] It can also be understood that when the standard torque sensor is connected to the object to be detected, since the object to be detected is such as a wrench, the interface and the top shape of the screw are consistent, both are polygonal, generally hexagonal, so in this embodiment, an adapter of corresponding specifications and sizes is used for connection to ensure that the standard torque sensor and the object to be detected rotate synchronously.

[0046] It is understandable that the servo motor can be controlled to rotate by three methods in the prior art: computer automatic control, electronic hand bell and manual button switch. This embodiment does not improve the control method of the servo motor and will not be described in detail.

[0047] This embodiment controls the servo motor and reducer to achieve forward and reverse bidirectional detection. The servo motor power is selected based on the configured reducer. The servo motor's rotation is controlled through three modes: computer automatic control, electronic handwheel, and manual keystroke. The servo motor drives the reducer, which is axially connected to the standard torque sensor and the object being detected in turn via precision couplings. The entire process achieves closed-loop control, with a high degree of automated control, good system repeatability, and high data accuracy, while also avoiding human errors caused by manual operation.

[0048] Compared to a single calibration / standard device, this embodiment can detect a variety of different types of detection objects and can adapt to detection objects of different sizes.

[0049] Although the above description of the specific implementation methods of the present invention is combined with the accompanying drawings, it does not limit the scope of protection of the present invention. Technical personnel in the relevant field should understand that on the basis of the technical solution of the present invention, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the present invention.

Claims

1. A multifunctional torque standard device, characterized in that: The invention comprises a horizontal platform, a reducer is fixedly arranged on one side of the platform, and the input end of the reducer is connected to the servo motor; on the side of the reducer away from the servo motor, two parallel tracks are fixedly arranged on the platform, and the tracks are parallel to the output shaft of the reducer; Three support seats are provided on the track, a first support seat is fixedly provided next to the reducer, and the output shaft of the reducer passes through the first support seat and is connected to the first standard torque sensor through the first coupling; A second support seat and a third support seat are slidingly arranged on the track on one side of the first support seat away from the reducer, and a second standard torque sensor is arranged between the second support seat and the third support seat; two reaction baffles are arranged on the second support seat.

2. A multifunctional torque standard device according to claim 1, characterized in that: A first bearing is fixedly arranged on the first support seat, and the center of the first bearing is coaxially arranged with the output shaft of the reducer. The output end of the reducer passes through the first bearing and is connected to the first coupling.

3. A multifunctional torque standard device according to claim 1, characterized in that: A second bearing is fixedly arranged on the second support seat, and the center of the second bearing is coaxial with the output shaft of the reducer.

4. A multifunctional torque standard device as claimed in claim 3, characterized in that: The reaction baffle is located below the second bearing, and the two reaction baffles are symmetrically distributed relative to the second bearing.

5. A multifunctional torque standard device according to claim 1, characterized in that: A second coupling is fixedly arranged on the third support seat, the second coupling is coaxial with the output shaft of the reducer, and the second coupling is connected to a second standard torque sensor.

6. A multifunctional torque standard device according to claim 1, characterized in that: The first standard torque sensor has a small range, and the second standard torque sensor has a large range.

7. A multifunctional torque standard device according to claim 1, characterized in that: The bottom of the support seat is fixedly connected to two sliders, and the two sliders are matched with the rails for use, and the distance between the sliders is equal to the distance between the rails.

8. A multifunctional torque standard device according to claim 1, characterized in that: The cross section of the track is in the shape of an "I", a groove is provided on the slider, and protrusions are provided on both sides of the groove, which can enable the slider to be clamped on the track.

9. A multifunctional torque standard device according to claim 8, characterized in that: A bolt hole is provided on the top of the slider, and a bolt is screwed into the bolt hole of the slider so that the bolt presses against the track.

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